CN217152339U

CN217152339U - Noise-reduction centrifugal wind wheel and range hood

Info

Publication number: CN217152339U
Application number: CN202121042682.4U
Authority: CN
Inventors: 黄朴; 肖林辉; 刘伟龙; 乌胜斌
Original assignee: Chinabest Home Appliances Co Ltd
Current assignee: Chinabest Home Appliances Co Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-08-09
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a make an uproar centrifugal wind wheel and range hood fall. The noise-reduction centrifugal wind wheel comprises a rear disc and a plurality of blades fixed on the rear disc, wherein the blades are uniformly distributed on the periphery of the rear disc, and a preset distance is reserved between every two adjacent blades; the blade is composed of a blade front edge close to the blade rotating shaft and a blade rear edge far away from the blade rotating shaft, and a plurality of through holes penetrating through the blade front edge are formed in the blade front edge. The utility model discloses can reduce centrifugal wind wheel's operating noise.

Description

Noise-reduction centrifugal wind wheel and range hood

Technical Field

The utility model belongs to the technical field of centrifugal wind wheel technique and specifically relates to a centrifugal wind wheel and range hood of making an uproar falls.

Background

The centrifugal wind wheel is an air supply device with axial air inlet and radial air blowing, and is widely applied to various oil fume extraction equipment. Along with the improvement of the living standard of people, the requirements of users on the use experience of the range hood are higher and higher. The existing centrifugal wind wheel can generate noise when working, and particularly, when the centrifugal wind wheel works at a high speed, the working noise is larger, so that troubles can be brought to the life of a user, and the user experience is reduced. Therefore, how to reduce the working noise of the centrifugal wind wheel is a technical problem which needs to be solved urgently in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a centrifugal wind wheel and range hood of making an uproar falls can reduce the working noise of centrifugal wind wheel.

In order to solve the above problem, the utility model adopts the following technical scheme:

according to a first aspect of the present invention, an embodiment of the present invention provides a noise reduction centrifugal wind wheel, including a rear disc and a plurality of blades fixed on the rear disc, wherein the blades are uniformly distributed around the rear disc, and a preset distance is provided between two adjacent blades; the blade is composed of a blade front edge close to the blade rotating shaft and a blade rear edge far away from the blade rotating shaft, and a plurality of through holes penetrating through the blade front edge are formed in the blade front edge.

In some embodiments, the width of the vane leading edge is less than or equal to 2/3 of the vane width.

In some embodiments, the radius of curvature of the leading edge of the blade is less than the radius of curvature of the trailing edge of the blade.

In some embodiments, the noise reduction centrifugal wind wheel further comprises a first front disc and a second front disc, the rear disc is located in the middle of the blade, and two ends of the blade are respectively connected with the first front disc and the second front disc.

In some embodiments, the rear disc is provided with a plurality of fixing grooves matched with the blades, and the blades are arranged in the fixing grooves in a penetrating mode.

In some embodiments, the two ends of the blade are respectively provided with a connecting piece, the first front disc and the second front disc are both provided with mounting grooves, and the connecting pieces at the two ends of the blade respectively penetrate through the corresponding mounting grooves and are respectively buckled on the first front disc and the second front disc.

In some embodiments, the through holes are arranged in a matrix on the blade.

In some embodiments, the distance between two adjacent blades is 10-15cm, and the thickness of the blades is 0.3-1 mm.

In some embodiments, the through-holes are square holes or circular holes.

According to the utility model discloses a second aspect, the embodiment of the utility model provides a range hood, including the centrifugal wind wheel of making an uproar that falls of the arbitrary embodiment of above-mentioned first aspect.

The utility model discloses following beneficial effect has at least: the utility model discloses a through-hole has been seted up to centrifugal wind wheel's blade, forms the air bed between the adjacent blade, based on the sound absorption principle of perforated plate, can reduce centrifugal wind wheel's operating noise. Meanwhile, the through holes are located on the front edge of the blade, so that the working noise can be reduced, and the original air volume and static pressure of the centrifugal wind wheel can be maintained.

Drawings

Fig. 1 is a schematic structural view of a noise reduction centrifugal wind wheel according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a noise reduction centrifugal wind wheel according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a blade according to an embodiment of the present invention;

fig. 4 is a schematic view of the blade shown in fig. 3 from another perspective.

Wherein the reference numerals are: the blade comprises a rear disc 100, a fixing groove 110, a mounting groove 201, a first front disc 210, a second front disc 220, a blade 300, a through hole 301, a blade front edge 310, a blade rear edge 320 and a connecting piece 330.

Detailed Description

The present disclosure provides the following description with reference to the accompanying drawings to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. The terms and words used in the following description and claims are not limited to the literal meanings, but are used merely by the utility model to enable a clear and consistent understanding of the disclosure. Accordingly, it will be apparent to those skilled in the art that the following descriptions of the various embodiments of the present disclosure are provided for illustration only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.

The terms "having," "may have," "including," or "may include" used in various embodiments of the present disclosure indicate the presence of the respective functions, operations, elements, etc., disclosed, but do not limit additional one or more functions, operations, elements, etc. Furthermore, it is to be understood that the terms "comprises" or "comprising," when used in various embodiments of the present disclosure, are intended to specify the presence of stated features, integers, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, or groups thereof.

Although terms such as "first" and "second" used in various embodiments of the present disclosure may modify various elements of the various embodiments, the terms do not limit the corresponding elements. For example, these terms do not limit the order and/or importance of the corresponding elements. These terms may be used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the various embodiments of the present disclosure.

It will be understood that when an element (e.g., a first element) is "connected" to another element (e.g., a second element), the element can be directly connected to the other element or intervening elements (e.g., a third element) may be present.

An embodiment of the utility model provides a centrifugal wind wheel of making an uproar falls, as shown in fig. 1-4, it includes back plate 100 and fixes a plurality of blades 300 on back plate 100, and blade 300 evenly distributed is on the periphery of back plate 100, and the distance is predetermine at the interval between two adjacent blades 300 to form the air bed that supplies circulation of air between two adjacent blades 300.

The blade 300 is composed of a blade leading edge 310 and a blade trailing edge 320, the blade leading edge 310 is a part close to the rotation axis of the blade 300, the blade trailing edge 320 is a part far away from the rotation axis of the blade 300, and when the airflow flows in the air layer, the airflow passes through the blade leading edge 310 first and then passes through the blade trailing edge 320. In the embodiment, the blade leading edge 310 is provided with a plurality of through holes 301 penetrating through the blade leading edge 310 to form a perforated plate structure, and the working noise of the centrifugal wind wheel can be reduced by utilizing the sound absorption characteristic of the perforated plate.

Actual tests show that the rear edge 320 of the blade has a great influence on the air volume and the static pressure of the range hood, if the through hole 301 is located at the rear edge 320 of the blade, the static pressure is reduced, and meanwhile, in order to maintain the original air volume, the rotating speed of the motor needs to be increased. The through holes 301 of the present embodiment are located at the leading edge 310 of the blade, so that the air volume and the static pressure of the centrifugal wind wheel can be effectively maintained.

In order to illustrate the noise reduction effect of the centrifugal wind wheel in this embodiment, the centrifugal wind wheel in this embodiment is compared with a centrifugal wind wheel with non-perforated blades, and the air volume is 10m ³ Min, the experimental data obtained are as follows:

it can be seen that, under the same amount of wind, the utility model discloses a centrifugal wind wheel is about 1.3dB lower than the not fenestrate centrifugal wind wheel's of blade work noise, and noise reduction effect is obvious.

In an embodiment, the noise-reduction centrifugal wind wheel of this embodiment further includes a front disk, two ends of each blade are respectively fixed to the front disk and the rear disk, the front disk is in an annular structure, air is sucked in from the front disk along an axial direction, and then blown out along a radial direction through an air layer between two adjacent blades, so that the centrifugal wind wheel with air inlet at one side is formed.

In another embodiment, as shown in fig. 1, the noise reduction centrifugal wind wheel of this embodiment further includes a first front disk 210 and a second front disk 220, the rear disk 100 is located in the middle of the blade 300, which is equivalent to divide the blade into two groups, and two ends of the blade 300 are respectively connected to the first front disk 210 and the second front disk 220. The first front disk 210 and the second front disk 220 are both annular, and when the centrifugal wind wheel of this embodiment rotates, air is sucked in from the first front disk 210 and the second front disk 220 along the axial direction at the same time, and then blown out along the radial direction through an air layer between two adjacent blades, so as to form a centrifugal wind wheel with double-side air intake.

In this embodiment, as shown in fig. 2, a plurality of fixing grooves 110 may be formed on the rear disc 100, the shape of the fixing groove 110 may match the sectional shape of the blade 300, the size of the fixing groove 110 may be slightly larger than the sectional size of the blade 300, and the blade 300 may be inserted into the fixing groove 110 and may be fixedly connected to the rear disc 100 by welding.

Both ends of blade 300 all are provided with connecting piece 330, all can be provided with mounting groove 201 on first protecgulum 210 and the second protecgulum 220, and the connecting piece 330 at blade 300 both ends passes mounting groove 201 on first protecgulum 210 and the mounting groove 201 on the second protecgulum 220 respectively to the lock joint is on first protecgulum 210 and second protecgulum 220 respectively, makes things convenient for the installation and the dismantlement of blade 300.

The centrifugal wind wheel of above-mentioned unilateral air inlet and the centrifugal wind wheel of two side air inlets can be selected by the user according to actual need, for the convenience to understand the utility model discloses, the centrifugal wind wheel of above-mentioned two side air inlets is taken as the example herein to do concrete description.

In some embodiments, as shown in FIG. 3, the width of the blade leading edge 310 is less than or equal to 2/3 of the width of the blade 300. The too wide width of the blade front edge 310 can cause the through hole 301 to occupy the air outlet position of the blade 300, and influence the air volume and static pressure of the range hood; if the width of the leading edge 310 of the blade is too narrow, the number of the through holes 301 is reduced, and the noise reduction effect is not achieved. Through experiments, the width of the blade leading edge 310 is set to be less than or equal to 2/3 of the width of the blade 300, so that the noise reduction effect can be achieved, the air volume and the static pressure of the centrifugal wind wheel can be maintained, and particularly, the most suitable ratio is obtained when the width of the blade leading edge 310 is equal to 2/3 of the width of the blade 300.

Further, as shown in fig. 4, the radius of curvature of the leading edge 310 of the blade is smaller than the radius of curvature of the trailing edge 320 of the blade, which makes the inlet at the leading edge 310 of the blade closer to the air inlet direction, which is beneficial to reducing the friction force on the blade 300 and making the airflow flow smoother.

In an embodiment, the through holes 301 may be arranged in a matrix along the length direction of the blade 300, so that the distribution of the through holes 301 is more uniform, and accordingly, the airflow flow is more uniform, and the noise reduction effect may be ensured. Of course, the through holes 301 may be distributed uniformly on the blade leading edge 310 in other arrangement shapes according to actual needs.

Further, the through hole 301 is a square hole, and the through hole 301 may also be a circular hole or other polygonal holes according to actual requirements.

In some embodiments, the distance between two adjacent blades 300 is 10-15cm, specifically, the distance in the circumferential direction from the center of rotation of the blade 300, and the thickness of the blade 300 is 0.3-1 mm. The above dimensions enable a sufficient air layer to be formed between two adjacent blades 300, thereby securing the noise reduction effect.

An embodiment of the utility model provides a range hood, including centrifugal fan, this centrifugal fan includes the centrifugal wind wheel of making an uproar falls based on the blade trompil of above-mentioned arbitrary embodiment.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and it is not to be understood that the specific embodiments of the present invention are limited to these descriptions. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement.

Claims

1. The utility model provides a centrifugal wind wheel of making an uproar falls which characterized in that: the fan blade assembly comprises a rear disc and a plurality of blades fixed on the rear disc, wherein the blades are uniformly distributed on the periphery of the rear disc, and a preset distance is arranged between every two adjacent blades; the blade is composed of a blade front edge close to the blade rotating shaft and a blade rear edge far away from the blade rotating shaft, and a plurality of through holes penetrating through the blade front edge are formed in the blade front edge.

2. The noise-reducing centrifugal wind wheel according to claim 1, wherein: the width of the vane leading edge is less than or equal to 2/3 of the vane width.

3. The noise-reducing centrifugal wind wheel according to claim 2, wherein: the radius of curvature of the leading edge of the blade is less than the radius of curvature of the trailing edge of the blade.

4. The noise-reducing centrifugal wind wheel according to claim 1, wherein: the noise-reduction centrifugal wind wheel further comprises a first front disc and a second front disc, the rear disc is located in the middle of the blades, and two ends of each blade are connected with the first front disc and the second front disc respectively.

5. The noise-reducing centrifugal wind wheel according to claim 4, wherein: the rear disc is provided with a plurality of fixing grooves matched with the blades, and the blades are arranged in the fixing grooves in a penetrating mode.

6. The noise-reducing centrifugal wind wheel according to claim 4, wherein: the both ends of blade are provided with the connecting piece respectively, all be provided with the mounting groove on first front bezel and the second front bezel, the connecting piece at blade both ends passes corresponding mounting groove respectively and detains respectively on first front bezel and second front bezel.

7. A noise reducing centrifugal wind wheel according to any of claims 1-6, wherein: the through holes are arranged on the blades in a matrix shape.

8. A noise reducing centrifugal wind wheel according to any of claims 1-6, wherein: the distance between two adjacent blades is 10-15cm, and the thickness of each blade is 0.3-1 mm.

9. A noise reducing centrifugal wind wheel according to any of claims 1-6, wherein: the through hole is a square hole or a circular hole.

10. A range hood, its characterized in that: a noise reducing centrifugal wind rotor according to any of claims 1-9.